Do they have large green onion bulbs on them?
The bulbs on these normally won’t get past an inch thick, with the stem being almost as thick as the bulb for several inches past where they come out of the soil.
They might get a little bigger if they weren’t crowded, but I’ve never tried to thin them out to see what would happen if they had more space to grow.
The seed heads get up to maybe 2.5” diameter.
They have quite a nice flavor. Very oniony, but seldom unpleasantly pungent when eaten raw.